Beethoven, Ludwig. Fourth Symphony, fourth movement.

Ewell, Terry B. (Norman Herzberg, 20 August 1994). For clean articulation
of the rapidly tongued A3, Bb3, and C4 sixteenths hold down the
L. H. C flick key. For example, in the solo on Bb3-A3-Bb3 do not
flick each note but keep the C flick key down for the duration
of the three notes (lift on the following D4).